Surprisingly skinny Kim Kardashian

'Dancing With the Stars' competitor Kim Kardashian says people are always surprised by how skinny she is

Kim Kardashian says people are always surprised by how skinny she is.

The brunette beauty - who is currently competing on US TV talent show 'Dancing With the Stars' - insists her famously large behind makes fans think she is curvy all over.

She said: "I look a lot bigger on TV. When I meet people, the first thing they say is, 'Wow, you're so much smaller than I thought'. I look about 15 lbs heavier. I'm only 115 lbs, and everyone thinks I'm like 130 or 140. It's bizarre. I'm a US size 2!"

Kim - who is dating American football player Reggie Bush - also said she hopes appearing on the show will help her tone up.

She added: "I'm going to probably have kids soon, so I want to have the perfect body before then.

"I've lost a few pounds - nothing too crazy yet, but I heard you really start to lose weight when the show starts."

However, the 27-year-old beauty admits she is not expecting to lose a drastic amount of weight, because she could never entirely curb her junk food cravings.

She said: "I know that I'm not a stick-skinny girl, and I don't want to be or try to be. And I love to eat. Cooking is a big part of my life. "When you're putting that much time into perfecting something, you don't want to just eat a cheeseburger. I've been eating better."